Sobre a migração vertical diária do plâncton ao largo de Santos, Estado de São Paulo, Brasil

Moreira, Gloria S.

doi:10.1590/s0373-55241976000100004

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…Zooplankton biomass and ichthyoplankton abundance are usually high in coastal areas under the influence of brackish water outflow from large embayments or lagoonal systems including the Guanabara and Paranaguá bays, the Cananéia-Iguape estuarine system and the Patos Lagoon estuary (Vannucci and Almeida Prado, 1959;Vannucci, 1962;Moreira, 1976;Björnberg, 1981;Muxagata, 1999). Biomass maxima due to coastal zooplanktonic species are restricted to a rather narrow band influenced by CW, decreasing towards the outer shelf regardless of the season (Navas-Pereira, 1973;Hubold and Gurgel, 1978;Hubold, 1980;Bonecker et al, 1990;Muxagata, 1999;Resgalla et al, 2001).…”

Section: Influence Of Physical Processes On Zooplankton and Ichthyoplmentioning

confidence: 99%

Zooplankton and ichthyoplankton distribution on the southern Brazilian shelf: an overview

Lopes¹,

Katsuragawa²,

Dias³

et al. 2006

Sci. Mar.

121

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SUMMARY:The southern Brazilian coast is the major fishery ground for the Brazilian sardine (Sardinella brasiliensis), a species responsible for up to 40% of marine fish catches in the region. Fish spawning and recruitment are locally influenced by seasonal advection of nutrient-rich waters from both inshore and offshore sources. Plankton communities are otherwise controlled by regenerative processes related to the oligotrophic nature of the Tropical Water from the Brazil Current. As recorded in other continental margins, zooplankton species diversity increases towards outer shelf and open ocean waters. Peaks of zooplankton biomass and ichthyoplankton abundance are frequent on the inner shelf, either at upwelling sites or off large estuarine systems. However, meandering features of the Brazil Current provide an additional mechanism of upward motion of the cold and nutrient-rich South Atlantic Central Water, increasing phyto-and zooplankton biomass and production on mid-and outer shelves. Cold neritic waters originating off Argentina, and subtropical waters from the Subtropical Convergence exert a strong seasonal influence on zooplankton and ichthyoplankton distribution towards more southern areas. This brief review highlights the need for further experimental studies on zooplankton life cycle strategies in order to understand the major processes controlling food web dynamics in this shelf ecosystem.Keywords: zooplankton, ichthyoplankton, distribution, biomass, water masses, upwelling, continental shelf, south-western Atlantic Ocean. RESUMEN: INFLUENCIA DE LOS PROCESOS FÍSICOS EN LA DISTRIBUCIÓN DEL ZOOPLANCTON E ICTIOPLANCTON: UNA REVISIÓN DE LOS ESTUDIOS REALIZADOS ENLA COSTA SUR DE BRASIL. -La costa sur de Brasil representa la principal zona de pesca de la sardina brasileña (Sardinella brasiliensis), especie responsable de más del 40% de las capturas de especies marinas de la región. El desove y el reclutamiento están influenciados localmente por la advección estacional de aguas ricas en nutrientes procedentes tanto de fuentes costeras como oceánicas. Por otro lado, las comunidades planctónicas son controladas por procesos regenerativos asociados a la naturaleza oligotrófica del Agua Tropical procedente de la Corriente de Brasil. Como se ha observado para otros márgenes continentales, la diversidad de especies del zooplancton aumenta hacia las aguas de la plataforma externa y de océano abierto. Máximos en la biomasa de zooplancton y la abundancia de ictioplancton son frecuentes en la plataforma interna, tanto en afloramientos como en grandes sistemas estuáricos. No obstante, la formación de meandros en la Corriente de Brasil proporciona un mecanismo adicional para la ascensión de las aguas frías y ricas en nutrientes del Atlántico Sur Central, aumentando la biomasa fito-y zooplanctónica y la producción en la plataforma media y externa. Las aguas neríticas frías procedentes del estuario de La Plata y las aguas subtropicales de la Convergencia Subtropical ejercen una fuerte influencia en la distribución del zoopl...

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Section: Influence Of Physical Processes On Zooplankton and Ichthyoplmentioning

confidence: 99%

Zooplankton and ichthyoplankton distribution on the southern Brazilian shelf: an overview

Lopes¹,

Katsuragawa²,

Dias³

et al. 2006

Sci. Mar.

121

View full text Add to dashboard Cite

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“…The only data of this kind come from samples obtained with regular closing nets, which allow for few hauls at the same station, and these usually afford low precision in terms of vertical positioning and estimation of filtered volume. Several studies yielded useful data on vertical zooplankton distribution but these were generally derived from one sampling station, obviously compromising the horizontal resolution (e.g., Moreira 1976, Rocha 1982, Sinque 1983, Alvarez 1985.…”

Section: Descriptive Studies -Zooplankton Composition Abundance and mentioning

confidence: 99%

Marine zooplankton studies in Brazil: a brief evaluation and perspectives

Lopes

2007

An. Acad. Bras. Ciênc.

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Marine zooplankton research in Brazil has been primarily descriptive, with most studies focusing on community structure analysis and related issues. The composition and spatial distribution of several taxonomic groups are currently well known, although less-abundant and small-sized taxa as well as initial stages of almost all species have received little attention. Some numerically important taxa such as heterotrophic protists, ctenophores, acoel turbellarians and ostracods remain virtually unstudied. Large sectors of the continental shelf have not been sampled in detail, particularly those areas influenced by the North Brazil Current (5 • N-15 • S). Zooplankton abundance and biomass in offshore waters have seldom been quantified, and information on the distribution and vertical migration of meso-and bathypelagic species are lacking. Additional faunistic assessments must target those less-studied taxa and geographical locations. However, priority in ecological studies should be given to process-oriented investigations aimed at understanding the mechanisms controlling zooplankton distribution, trophic interactions within pelagic food webs and production cycles in relation to the physical environment. An effort should be made to incorporate state-of-the-art sampling technology and analytical methods into future research projects.

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“…A análise de dados correntométricos conduzida por Castro & Moreira (1994)* e, posterionnente, Moreira (1997), à latitude da cidade de Santos (23°S), indica que o fluxo em profundidades de 700 m foi para norte (mais precisamente nordeste, devido a orientação da costa) no decorrer do verão de 1993. Já os resultados dos fundeios do "World Ocean Circulation Experiment -WOCE" nas latitudes de 20oS, 24°S e 28°S, descritos por Müller et a/o (1998), corroboram os de Moreira (1997), e são coerentes com os padrões de fluxo propostos pelos estudos hidrográficos anteriores de Reid (1989) e Suga & Talley (1995) 6), onde pelo menos parte da corrente retoma em direção ao Equador (Reid, 1989;Weatherly, 1993). A descrição acima das massas de água que compõem os três primeiros quilômetros de coluna d'água e seus padrões de escoamento no Atlântico Sul A figura que emerge é a seguinte.…”

Section: Massas De áGua E Extensão Vertical Da Corrente Do Brasilunclassified

A corrente do Brasil ao largo da costa leste brasileira

et al. 2000

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There is relatively few and sparse information in the literature about the Brazil Current, the boundary current that closes the westem border of the South Atlantic Subtropical Gyre. ln this article, we present a review of the currently-available literature to give a coherent overview on the kinematic and dynamical aspects of the Brazil Current along the Eastem Brazilian eoast. We discuss the current structure in terms of its water mass composition and its vertical extension. We compile the available information on the Brazil Current velocity structure and volume transport along the shelf and shelf break from 90S to 3loS. We also address the Brazil Current meandering and eddy formation, and their possible role in promoting shelf-break upwelling off the Southeast Brazilian coast.

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Sobre a migração vertical diária do plâncton ao largo de Santos, Estado de São Paulo, Brasil

Cited by 6 publications

References 18 publications

Zooplankton and ichthyoplankton distribution on the southern Brazilian shelf: an overview

Zooplankton and ichthyoplankton distribution on the southern Brazilian shelf: an overview

Marine zooplankton studies in Brazil: a brief evaluation and perspectives

A corrente do Brasil ao largo da costa leste brasileira

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